What exactly are they claiming was installed incorrectly by the shop? It's funny how RoughCountry's 3.5" lift comes with upper control arms, but they're 2" level specifically for TB/AT4 which would stretch lift to 4" doesn't.
This is the second time in the past couple weeks that I have heard of an upper balljoint failure. Not gonna lie, driving to work this morning I thought about it and it made me nervous. I didn't go the spacer route for my level, I used FabTech 3.5" coilovers and upper control arms, but I'm still uneasy.